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<p>Hello,</p>

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<p>Can MapProxy support differing x and y resolutions?  For example, GeoPackage caches support differing x and y resolutions when defining the pixel_x_size and pixel_y_size values in the gpkg_tile_matrix table.</p>

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<p>It seems that in _verify_tile_size in geopackage.py, this line of code: </p>

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<pre style="font-family: "Courier New"; font-size: 9pt;"><span style="color:#000080;font-weight:bold;">if not </span>is_close(gpkg_pixel_x_size, resolution) <span style="color:#000080;font-weight:bold;">or not </span>is_close(gpkg_pixel_y_size, resolution):<br></pre>

...is essentially checking to make sure the x and y resolutions match.  If they don't, it throws an error.  There doesn't seem to be away to specify differing x and y resolutions in a configuration's grid.

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<p>I ask because MapProxy can't properly transform the tiles in a cache with differing x and y resolutions, in this case meaning MapProxy isn't fully supporting the GeoPackage spec.</p>

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<p>Best,</p>

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<b>Dominic Napoleon</b></p>

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Reinventing Geospatial®, Inc. (RGi®)</p>

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<span style="font-size:9pt; font-family:Calibri,sans-serif,serif,EmojiFont"><span class="contextualExtensionHighlight ms-font-color-themePrimary ms-border-color-themePrimary ident_890_939" tabindex="0">4035 Ridge Top Road, Suite 520, Fairfax, VA 22030</span></span></p>

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<span style="font-size:9pt; font-family:Calibri,sans-serif,serif,EmojiFont"> </span></p>

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<span style="font-size:9pt; font-family:Calibri,sans-serif,serif,EmojiFont">Office:   703-272-3204 x2094</span></p>

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<span style="font-size:9pt; font-family:Calibri,sans-serif,serif,EmojiFont"><a href="mailto:sidney.medford@rgi-corp.com" target="_blank" rel="noopener noreferrer" id="LPNoLP"><span style="color:blue">dominic.napoleon@rgi-corp.com</span></a></span></p>

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